I think we must quote whenever we feel that the allusion is interesting or helpful or amusing.

Science fiction is a kind of archaeology of the future.

My son is 7 years old. I am 54. It has taken me a great many years to reach that age. I am more respected in the community, I am stronger, I am more intelligent and I think I am better than he is. I don't want to be a pal, I want to be a father.

Being a child is in itself a profession.

The adjective is the banana peel of the parts of speech.

Insomnia is a gross feeder. It will nourish itself on any kind of thinking, including thinking about not thinking.

What is a sense of humor? Surely not the ability to understand a joke. It comes rather from a residing feeling of one's own absurdity. It is the ability to understand a joke, and that the joke is on oneself.